cromlech

cromlech (krŏmˈlĕk) [key] [Welsh or Breton, = crooked stone], term that has changed in meaning from its original equivalent to dolmen. It later came to be used for a single standing stone and now usually refers to a circle of such stones; however, the term is used in this sense for such remains on the Continent, e.g., Britanny and Portugal, rather than for those on the British Isles.